Index: src/thread.c
===================================================================
--- src/thread.c	(revision 22650)
+++ src/thread.c	(working copy)
@@ -638,7 +638,7 @@
 =cut
 
 */
-
+int
 pt_thread_run(PARROT_INTERP, PMC* dest_interp, PMC* sub, PMC *arg)
 {
     PMC *old_dest_interp;